A is a range of scores that we feel confident will include the test taker’s true score. It is important because it gives us a realistic estimate of how much error is likely to exist in an individual’s observed score.

Confidence interval

Explanation:

Confidence interval is a range of scores that we feel confident will include the test taker's true score.

lt is an interval and confidence level calculated for an estimate of an unknown population parameter, used to indicate how accurate the estimate is and of how confident we are that the result is correct.

answer; people have no objective standard by which to judge themselves;